Ultrasonic Time of Flight Estimation for Wind Speed Measurement Based on Time-Frequency Domain Using STFT

Rafael Moura Duarte, Juan Moises Mauricio Villanueva, Maxwell Moura Costa, Raimundo Freire, Sebastian Yuri Cavalcanti Catunda, Wendell Moura Costa

Abstract

This paper presents a procedure for wind speed measurement using ultrasonic transducers based on short-time Fourier transform (STFT). The measurement of wind speed was performed by estimating the ultrasonic transit-time (ToF). For this purpose the estimated ToF was used the technique of digital signal processing, based on the STFT. The ultrasonic signal detection was performed by setting a threshold level equivalently half the maximum power for the operating frequency of the ultrasonic transducers. Simulation results are presented considering the influence of the additive noise Gaussian, and estimation of ToF considering the evaluation of STFT windows using Hamming, Hanning and Bartlett.

Keywords

ultrasonic transducers, time-domain analysis (STFT), wind speed measurement

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IMEKO-TC4-2013-024.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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